/*
   Copyright (c) 2011, 2012 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-18 Marco Riccardi - initial implementation
 *  2012-04-06 Marco Riccardi - added message in DliParseException
 *
 */
package org.mizartools.dli;

public class Part extends Formula {

	private Formula formula1 = null;
	private Term term1 = null;
	private Formula formula = null;
	
	private Part(){}
	
	public Part(Formula formula1, Term term1, Formula formula){
		this.formula = formula;
		this.term1 = term1;
		this.formula1 = formula1;
	}
	
	public static Part newInstance(String string) throws DliParseException {
		Part part = new Part();
		int position = string.indexOf("(");
		if (position == -1) {
			throw new DliParseException("["+string+"] is not valid in Part");
		}
		if (!string.substring(0, position).equals("$part")){
			throw new DliParseException("["+string+"] is not valid in Part");
		}
		string = string.substring(position+1, string.length()-1);
		int positionComma = Utility.searchSeparationComma(string);
		if (Formula.isFormula(string.substring(0, positionComma))){
			part.formula1 = Formula.newInstance(string.substring(0, positionComma));
		} else {
			part.term1 = Term.newInstance(string.substring(0, positionComma));
		}
		part.formula = Formula.newInstance(string.substring(positionComma+1));
		return part;
	}
	
	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("$part(");
		if (formula1 != null) {
			sb.append(formula1.toString());
		} else {
			sb.append(term1.toString());
		}
		if (formula != null) {
			sb.append(",");
			sb.append(formula.toString());
		}
		sb.append(")");
		return sb.toString();
	}

}
